As Padraic Brady points out, there's a new PHP user group that's been formed for those in and around the two locations - in Dublin and in Cork:

There may only be just 4 million+ of us Irish folk, but we do have an Irish PHP User Group which started up recently. If you're anywhere near Dublin or Cork cities on the last Wednesday of any month, meetings are held at 8pm on those days

If you'd like more information on the group there's on of two places to check them out - either on their website with details about meetings and group news or over on the irc.php.ie IRC server in the #phpug channel for more interactive information.